Do you know what the secondary caries is?

The secondary caries


Do you know the reason why after treatment teeth have cavities even though you brush teeth every day?
That's because of the secondary caries.
Each time you go to the dental clinic after your filling fell out, you might have experienced dentist telling you that you have tooth decay under the filling.
Why do we still have cavities again after the treatment?
The reason for this is cement and tooth surfaces adherence within the tooth hole.
A tooth has a two-layer structure; dentin and enamel.
They have totally different components and surface structures.
Enamel components are minerals.
Dentin, though, is complicated.
For instance, it has water containing tubes going though it connecting nerves to enamel.
After setting an artificial material into the tooth, in the tooth water comes up gradually from the small tubes and deteriorates the adherence surface.
It is difficult to bind materials with different surface structure such as enamel, dentin, metal or ceramic.
After certain amount of time, cement between the filling and the tooth surface will wash out.
Finally bacteria will appear and form secondary caries in the developed gap.
Dentin decays faster than enamel, so it is not unusual that secondary caries gets closer to the dental nerve.
So the process goes as follows:
1. Cement washes out.
2. Bacteria start cavity within the formed gap.
3. Filling falls out.
4. Worst case scenario‐patient may lose his/her tooth.

In order to prevent forming of secondary caries insoluble cement should be used.
It also should adhere all three‐enamel, dentin and filling in a special way.
To achieve best performance result we use a microscope and advanced adhesive technology.
The adherence treatment requires about 60 minutes per one tooth including bite adjustment etc.